Metal-organic frameworks as solid-phase microextraction adsorbents for the determination of triacetone triperoxide by gas chromatography-mass spectrometry

Weiya Xie; Xiaohan Zhu; Hongcheng Mei; Hongling Guo; Haiyan Li; Ping Wang; Yajun Li; Xianhe Deng; Jun Zhu; Can Hu

doi:10.1016/j.forsciint.2023.111852

Metal-organic frameworks as solid-phase microextraction adsorbents for the determination of triacetone triperoxide by gas chromatography-mass spectrometry

Forensic Sci Int. 2023 Nov:352:111852. doi: 10.1016/j.forsciint.2023.111852. Epub 2023 Oct 2.

Authors

Weiya Xie¹, Xiaohan Zhu¹, Hongcheng Mei², Hongling Guo², Haiyan Li², Ping Wang², Yajun Li², Xianhe Deng², Jun Zhu³, Can Hu⁴

Affiliations

¹ Peoples' Public Security University of China, PR China; Insititute of Forensic Science, Ministry of Public Security, PR China.
² Insititute of Forensic Science, Ministry of Public Security, PR China.
³ Insititute of Forensic Science, Ministry of Public Security, PR China. Electronic address: zhujun001cn@126.com.
⁴ Insititute of Forensic Science, Ministry of Public Security, PR China. Electronic address: hucanjiayou@126.com.

PMID: 37839179
DOI: 10.1016/j.forsciint.2023.111852

Abstract

Triacetone triperoxide (TATP) is a high-power explosive which is often used by criminals. The detection of TATP is of great significance for solving the explosion cases. However, the preconcentration and analysis of trace levels of TATP still pose challenges for analytical researchers. In this study, metal-organic frameworks (MOFs), including IRMOF-8, MOF-5, UIO-66, ZIF-8, and MIL-101(Cr), were immobilized on a stainless steel wire using a physical adhesive method as a solid-phase microextraction (SPME) fiber coating. The prepared fibers with a controllable thickness were used for the extraction of TATP followed by gas chromatography-mass spectrometry (GC-MS) analysis. Under the identical experimental conditions, the IRMOF-8-coated fiber exhibited higher extraction efficiency for TATP than the other fibers. The IRMOF-8-coated fiber was then characterized using scanning electron microscopy and thermogravimetric analysis. The results indicated that the IRMOF-8-coated fiber not only had good thermal and chemical stabilities but also afforded a high TATP extraction efficiency. Under the same extraction conditions, the extraction efficiency of the IRMOF-8-coated fiber was 2-8 times higher than those of commercial fibers. The limit of detection was 13 ng/mL, and linearity was observed in the range of 50-5000 ng/mL with a correlation coefficient greater than 0.998. The intraday repeatability (n = 6), interday repeatability (n = 3), and fiber-to-fiber reproducibility (n = 3), were 4.1 %, 4.8 %, and 8.0 %, respectively. The recoveries of TATP from the simulated tap water and soil samples were 87.32-90.57 % and 88.76-100.93 %, respectively, with relative standard deviations lower than 11.11 % (n = 3). The above method was successfully applied for the detection of TATP transferred from a finger to a paper surface, demonstrating its good application prospects in the analysis of trace TATP.

Keywords: Gas chromatography-mass spectrometry; Metal-organic frameworks; Solid-phase microextraction; Triacetone triperoxide.